Backend Software Engineer; Mid-Level Job London England UK,Software Development

Position: Backend Software Engineer (Mid-Level)
Location: Greater London

Join to apply for the Backend Software Engineer (Mid-Level) role at The Keyholding Company

Overview

We are a digitally transformed, tech-enabled security services company. We’re looking for an experienced backend software engineer to join our small but ambitious technology team, thriving in a dynamic, startup‑paced environment.

We’re proud of what we’ve achieved so far and need talented engineers to grow smoothly. This role offers an opportunity to support our innovative products and expand our existing platform by breaking it down into smaller flexible services.

What You Get

Excellent salary of £55k‑£59k per annum (DOE)
Full‑time, permanent, flexible working basis with the ability to work from home but must travel to our London Farringdon HQ twice a month for TKC Collaboration days or as/when required
Internal training and development opportunities, all in an excellent working environment
Personalised career development plans through our My TKC Journey initiative
Auto‑enrolment into our salary sacrifice pension scheme, 24/7 confidential Employee Assistance Program, and a voluntary health cash scheme starting at £1 per week
Regular social events, monthly team days, and an exercise club to keep you connected and active
Fast‑paced and exciting role, no two days are ever the same!

What You'll Be Doing Creating new services to support our product family

Contributing to design and architecture discussions

Writing well‑designed, testable, metrics‑driven code

Writing automated tests to ensure product quality

Transforming our existing platform into a new event‑driven microservices architecture

Discovering and trialling new tools to introduce to the company to grow the Agile development environment

Utilizing cloud technologies to confirmé? Wait doc?) . What We're Working With

Programming

Languages:

Python, Kotlin, Terraform, Java, JavaScript (Node), Typescript Databases:
Aurora, Postgres, Snowflake
Infrastructure: AWS, Docker, Kubernetes
Other technologies:
Kafka, Git Hub Actions, Jenkins, Datadog

What We're Looking For

You’re great at leveraging modern development techniques to create back‑end solutions
You’re ambitious and looking to advance your career
Experience working in an Agile, fast-paced, Dev Ops environment
Experience working with cloud-native technologies, specifically with AWS
3+ years proven commercial experience as a software developer or a similar role
Experience using Python or Kotlin – JavaScript, Java, or another modern language is a bonus

Equity, Diversity and Inclusion matter to us. We are keen to hear from candidates from a broad range of backgrounds and experiences and are excited about learning from you, as much as we know you can learn from us.

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